#!/usr/bin/env python # Copyright (c) 2021 The Chromium Authors. All rights reserved. # Use of this source code is governed by a BSD-style license that can be # found in the LICENSE file. """Creates a dummy RTS filter file and a dummy inverse filter file if a real ones do not exist yet. Real filter files (and their inverse) are generated by the RTS binary for suites with any skippable tests. The rest of the suites need to have dummy files because gn will expect the file to be present. Implementation uses try / except because the filter files are written relatively close to when this code creates the dummy files. The following type of implementation would have a race condition: if not os.path.isfile(filter_file): open(filter_file, 'w') as fp: fp.write('*') """ import errno import os import sys def main(): filter_file = sys.argv[1] # '*' is a dummy that means run everything write_filter_file(filter_file, '*') inverted_filter_file = sys.argv[2] # '-*' is a dummy that means run nothing write_filter_file(inverted_filter_file, '-*') def write_filter_file(filter_file, filter_string): directory = os.path.dirname(filter_file) try: os.makedirs(directory) except OSError as err: if err.errno == errno.EEXIST: pass else: raise try: fp = os.open(filter_file, os.O_CREAT | os.O_EXCL | os.O_WRONLY) except OSError as err: if err.errno == errno.EEXIST: pass else: raise else: with os.fdopen(fp, 'w') as file_obj: file_obj.write(filter_string) if __name__ == '__main__': sys.exit(main())